I would recommend Celestial Dawn since it will dodge around color requirements that I can imagine will be a big issue with this deck.

Or another card I would suggest is Smothering Tithe to generate some treasure for color fixing.

How about Evolution Sage

Joe_Ken_ how does Celestial Dawn interact with Niv-Mizzet Reborn ability to tutor color pairs? Will this nullify it if they are all considered white?

Yuki_onna I did think of him but I wasn’t sure what I could cut out for it. Also I figured that Flux Channeler was just slightly stronger as I could potentially cast multiple walkers late game. I like the idea though thanks!

Makushimoo Itbwould probably make Niv’s ability not work since it would make everything Mono White, but I would still consider it useful for the deck since it is a way to get around color fixing if you ever just need to play the cards out of your hand.

Joe_Ken_ I figured that would be the case. I haven't had much issues with the color fixing, but I will keep it in consideration in case I see problems with the mana the more i play test. Thank you!

Sorin, Grim Nemesis Has always been very good in my Atraxa superfriends deck as both card draw and a win condition, and Crystalline Crawler helps a lot with ramp and fixing.

Diddle I had considered Crystalline Crawler but it seemed a little slow without Atraxa being the commander and proliferating regularly. I am board wiping a considerable amount so he probably wouldn't last long but I will test Sorin, Grim Nemesis though, he seems pretty playable. Thank you!

Sundial Update: Sundial of the Infinite felt the card was dead 80% of the time and all it did was draw out hate if it was in play and I never really wanted to play out Sudden Disappearance when i had it. Feel they might be a little clunky,

Removing: Sundial of the Infinite Sudden Disappearance

Adding: Flux Channeler Mana Vault